Light is sown for the righteous - That is, There is light for the righteous; or, they shall be brought into light, though they may be for a time in darkness. The word rendered “sown” - זרע zâra‛ - is from a verb which properly denotes to scatter, to disperse - as seed is scattered or dispersed when sown in a field. It is hence used with reference to moral subjects, as to sow righteousness, Proverbs 11:18; to sow iniquity, Proverbs 22:8; to sow mischief, Job 4:8; that is, these things are scattered or sown, as seed is in a field, and produce a corresponding harvest. Thus light is scattered abroad, and will produce an appropriate harvest - a harvest of joy. It will spring up around the righteous, and he shall reap that which light tends to produce - happiness, intelligence, and peace. The figure of sowing light is an unusual one, but the meaning is plain. It is, that the righteous will not always be in darkness; that there is in preparation for him a harvest of joy; that it will as certainly be produced as a harvest will from grain that is sown; that though there may be present calamities, there will be ultimate peace and triumph.
And gladness for the upright in heart - The word gladness here - joy, or rejoicing - is parallel to the word light. Joy or gladness is sown for the righteous; that is, arrangements are made for producing joy, as preparations are made by sowing seed for a harvest. The world is full of arrangements for conferring happiness on the righteous.